Drive device, optical component drive device, and electronic device

Abstract

The present invention provides a drive device, an optical component drive device, and an electronic device that can achieve miniaturization. The drive device has, in a three-dimensional XYZ rectangular coordinate system, a first component, a second component that overlaps the first component in the Z direction and is relatively movable with respect to the first component in the X direction, at least two X-direction coils that are spaced and fixed to the first component in the X direction, and at least two X-direction magnetic bodies that are spaced and fixed to the second component in the X direction. The at least two X-direction coils have a common winding axis in the X direction, one of the X-direction magnetic bodies is inserted into one of the corresponding X-direction coils, and the other X-direction magnetic body is inserted into the other X-direction coil.

Description

Technical Field

[0001] The present invention relates to a driving device, an optical component driving device, and an electronic device.

Background Art

[0002] Conventionally, there has been a driving device such as a driving device that uses a coil and a magnet to obtain a driving force by electromagnetic force as disclosed in Patent Document 1.

[0003]

Prior Art Documents

[0004]

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006]

Technical Problem to be Solved by the Invention

[0007] However, the above structure requires the outer surfaces of the coil and the magnet to face each other, making it difficult to miniaturize to some extent. The present invention aims to provide a driving device, an optical component driving device, and an electronic device that can be miniaturized.

[0008]

Technical Solution

[0009] One aspect of the present invention is a driving device that, in a three-dimensional XYZ rectangular coordinate system, includes a first component, a second component that overlaps the first component in the Z direction and is relatively movable with respect to the first component in the X direction, at least two X-direction coils that are spaced apart and fixed to the first component in the X direction, and at least two X-direction magnetic bodies that are spaced apart and fixed to the second component in the X direction. The at least two X-direction coils have a common winding axis in the X direction, and one of the X-direction magnetic bodies is inserted into one of the corresponding X-direction coils, and the other X-direction magnetic body is inserted into the other X-direction coil.

[0010] Preferably, in the initial position of the above driving device, one of the X-direction magnetic bodies faces one of the X-direction coils near the -X direction end, and the other X-direction magnetic body faces the other X-direction coil near the +X direction end.

[0011] Furthermore, preferably, in the initial position, a specified current is applied to one of the X-direction coils to drive either the first component or the second component in the +X direction. Also, a specified current is applied to the other X-direction coil to drive either the first component or the second component in the -X direction. Moreover, specified currents are simultaneously applied to one of the X-direction coils and the other X-direction coil respectively to return the first component or the second component to the initial position.

[0012] Moreover, another aspect of the present invention is a drive device. In a three-dimensional XYZ rectangular coordinate system, it has a first component, a second component that overlaps the first component in the Z direction and is free to slide in the X direction, a third component that overlaps the second component in the Z direction and is free to slide in the Y direction, at least two X-direction coils spaced apart in the X direction on either the first component or the second component, at least two X-direction magnets spaced apart in the X direction on the other of the first component or the second component, at least two Y-direction coils spaced apart in the Y direction on either the second component or the third component, at least two Y-direction magnets spaced apart in the Y direction on the other of the second component or the third component. One of the X-direction magnets is inserted into one of the corresponding X-direction coils, the other X-direction magnet is inserted into the other X-direction coil, one of the Y-direction magnets is inserted into one of the corresponding Y-direction coils, and the Y-direction magnet is inserted into the other Y-direction coil.

[0013] Another aspect of the present invention is a drive device. In a three-dimensional XYZ rectangular coordinate system, it has a first component, a second component that overlaps the first component in the Z direction and is free to slide in the X direction, at least two X-direction coils spaced apart in the X direction on the first component, at least two X-direction magnets spaced apart in the X direction on the second component, at least two Y-direction coils spaced apart in the Y direction on the first component, at least two Y-direction magnets spaced apart in the Y direction on the second component. One of the X-direction magnets is inserted into one of the corresponding X-direction coils, the other X-direction magnet is inserted into the other X-direction coil, one of the Y-direction magnets is inserted into the corresponding Y-direction coil, and the other Y-direction magnet is inserted into the other Y-direction coil.

[0014] Another aspect of the present invention is a drive device, which has a first component, a second component that is relatively movable with respect to the first component in a specified direction, two coils fixedly arranged on the first component, one or two magnets fixedly arranged on the second component. The two coils have a common winding axis in the specified direction, the central positions of the two coils are arranged at different positions in the specified direction, and the one or two magnets are arranged on the winding axis.

[0015] If current is applied to one of the two coils, one of the magnetic bodies or one of the two magnetic bodies moves toward the center of the one coil; if current is applied to the other coil of the two coils, the other of the one magnetic body or the two magnetic bodies moves toward the center of the other coil. Moreover, a part of the two coils may be overlapped and wound, or may be connected to each other. Further, the two coils may have the same length and be overlapped and wound only by half of the length; there is also a coil having a common winding axis and the same length as the two coils, connected to one of the two coils, and overlapped and wound with the other of the two coils only by half of the length. Further, it has an outer yoke formed of a magnetic material, and the outer yoke may be respectively disposed outside the two coils, and the outer yoke may further cover the outer end faces of the two coils.

[0016] Another aspect of the present invention is an optical component driving device, in which any one component is used as a fixed body, and other components are used as movable bodies, and optical components are provided on the fixed body and the movable body.

[0017] Another aspect of the present invention is an electronic device having the optical component driving device.

[0018]

Advantages of the Invention

[0019] According to the present invention, a magnetic body is disposed in a so-called empty space (i.e., inside the winding of the coil). Therefore, a driving device, an optical component driving device, and an electronic device that can be miniaturized can be provided.

Description of the Drawings

[0020]

Figure 1

[0021]

Figure 2

[0022]

Figure 3

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Figure 4

[0024]

Figure 5

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Figure 6

[0026]

Figure 7

[0027]

Figure 8

[0028]

Figure 9

[0029]

Figure 10

[0030]

Figure 11

[0031]

Figure 12

[0032]

Figure 13

[0033]

Figure 14

[0034]

Figure 15

[0035]

Figure 16

[0036]

Figure 17

Detailed Description

[0037] Figures 1 to 3 The drive device 10 involved in the first embodiment of the present invention is shown.

[0038] In a three-dimensional XYZ rectangular coordinate system, the drive device 10 has a first member 12, a second member 14, and a third member 16 that overlap in the Z direction.

[0039] Moreover, in this specification, the optical axis direction of the imaging device described later is used as the Z direction for explanation.

[0040] When observing the first member 12, the second member 14, and the third member 16 from the Z direction, the three form a square plate shape. The first member 12 is, for example, a fixed body, and the second member 14 and the third member 16 are movable bodies relative to the first member 12. However, since the movement of the first member 12, the second member 14, and the third member 16 described later is relative movement, it is possible to arbitrarily determine which member is set as the fixed body and which member is set as the movable body.

[0041] As Figure 2 shown, the first member 12 has a relative surface 18 facing the second member 14, and on the relative surface 18, for example, two X-direction guiding recesses 20, 20 extending in the X direction are formed. The X-direction guiding recesses 20, 20 are, for example, arc-shaped in cross-section and are formed near the +-Y direction ends of the first member 12.

[0042] As Figure 3 shown, the second member 14 has a relative surface 22 facing the first member 12, and on the relative surface 22, for example, two X-direction guiding protrusions 24, 24 extending in the X direction are formed. The X-direction guiding protrusions 24, 24 are arc-shaped in cross-section and are freely movably inserted into the X-direction guiding recesses 20, 20. The X-direction guiding protrusions 24, 24 are shorter than the X-direction guiding recesses 20, 20, and the second member 14 can slide relative to the first member 12 in the X direction.

[0043] As Figure 3 shown, the third member 16 has a relative surface 26 facing the second member 14, and on the relative surface 26, for example, two X-direction guiding recesses 28, 28 extending in the y direction are formed. The Y-direction guiding recesses 28, 28 are, for example, arc-shaped in cross-section and are formed near the +-X direction ends of the third member 16.

[0044] As Figure 2 shown, the second member 14 has a relative surface 30 facing the third member 16, and on the relative surface 30, for example, two Y-direction guiding protrusions 32, 32 extending in the Y direction are formed. The Y-direction guiding protrusions 32, 32 are arc-shaped in cross-section and are freely movably inserted into the Y-direction guiding recesses 28, 28. The Y-direction guiding protrusions 32, 32 are shorter than the Y-direction guiding recesses 28, 28, and the third member 16 can slide relative to the second member 14 in the Y direction.

[0045] As Figure 2 shown, an X-direction coil arrangement groove 34 extending in the X direction is formed at the center of the opposite surface 18 of the first member 12. The first X-direction coil 36Xa and the second X-direction coil 36Xb are fixedly arranged on the X-direction coil arrangement groove 34. The first X-direction coil 36Xa and the second X-direction coil 36Xb are spaced apart in the X direction and are wound around a common winding axis in the X direction, and the winding surfaces face each other in the X direction. Moreover, as Figure 4 shown, the first X-direction coil 36Xa and the second X-direction coil 36Xb are formed into a flattened shape that is deflated in the Z direction. Thereby, the thickness of the first member 12 can be made thinner.

[0046] As Figure 3 shown, at the center of the opposite surface 22 of the second member 14, the first pedestal 38 and the second member 14 are integrally formed and protrude toward the first member 12 side. Moreover, an X-direction arm 40 is provided and extends from the first pedestal 38 in the -X direction and the +X direction. The -X direction end of the X-direction arm 40 holds the first X-direction magnet 42Xa, and the +X direction end holds the second X-direction magnet 42Xb. The first X-direction magnet 42Xa and the second X-direction magnet 42Xb are, for example, ferromagnetic bodies and are composed of a soft magnetic material (i.e., ferroalloy, etc.).

[0047] Moreover, in this embodiment, the first X-direction magnet 42Xa and the second X-direction magnet 42Xb are formed in a plate shape, but may also be in a cylindrical shape or a spherical shape.

[0048] As Figure 4 shown, the first X-direction magnet 42Xa includes the X-direction arm 40 and is inserted into the first X-direction coil 36Xa without contacting it, and the second X-direction magnet 42Xb includes the X-direction arm 40 and is inserted into the second X-direction coil 36Xb without contacting it.

[0049] As Figure 5 (a) shown, in the initial state, the center Moa of the first X-direction magnet 42Xa is located near the winding end portion Cea1 on the outer side in the -X direction of the first X-direction coil 36Xa, and the center Mob of the second X-direction magnet 42Xb is located near the winding end portion Ceb1 on the outer side in the +X direction of the second X-direction coil 36Xb.

[0050] Moreover, as Figure 3As shown, a Y-direction coil arrangement groove 44 extending in the Y direction is formed at the center of the opposite surface 26 of the third component 16. The first Y-direction coil 36Ya and the second Y-direction coil 36Yb are fixedly arranged on the Y-direction coil arrangement groove 44. The first Y-direction coil 36Ya and the second Y-direction coil 36Yb are spaced apart in the Y direction and wound around a common winding axis in the Y direction, and the winding surfaces face each other in the Y direction.

[0051] Moreover, as Figure 2 shown, at the center of the opposite surface 30 of the second component 14, the second pedestal 48 and the second component 14 are integrally formed and protrude toward the third component 16 side. Moreover, a Y-direction arm 50 is provided and extends from the second pedestal 48 in the -Y direction and the +Y direction. The -Y direction end of the Y-direction arm 50 holds the first Y-direction magnet 42Ya, and the +Y direction end holds the second Y-direction magnet 42Yb. (Not shown)

[0052] Similar to the X direction described above, the first Y-direction magnet 42Ya is inserted into the first Y-direction coil 36Ya and is non-contact therewith, and the second Y-direction magnet 42Yb is inserted into the second Y-direction coil 36Yb and is non-contact therewith.

[0053] As Figure 3 shown, on the back side of the first component 12, an X-direction magnet 54 extending in the X direction is formed at the center of the first component 12. Moreover, as Figure 1 and Figure 2 shown, on the front side of the third component 16, a Y-direction magnet 56 extending in the Y direction is formed at the center of the third component 16. The X-direction magnet 54 and the Y-direction magnet 56 cause the first component 12, the second component 14, and the third component 16 to be mutually pressed in the Z direction by the magnetic force generated between the first X-direction magnet 42Xa and the second X-direction magnet 42Xb and between the first Y-direction magnet 42Ya and the second Y-direction magnet 42Yb.

[0054] Moreover, instead of the magnets 54, 56, the first component 12, the second component 14, and the third component 16 can also be elastically held by springs or the like.

[0055] The operation of the drive device 10 will be described below using Figure 5 and Figure 6 .

[0056] In Figure 5 , a coil with a cross-section of ○ represents a non-energized state, and a coil with a cross-section of ● represents an energized state.

[0057] Figure 5(a) shows the positional relationship in the initial state. In the X direction, the centers Moa and Mob of the first X-direction magnet 42Xa and the second X-direction magnet 42Xb are located near the winding ends Cea1 and Ceb1 outside the first X-direction coil 36Xa and the second X-direction coil 36Xb.

[0058] In the above-mentioned positional relationship of the initial state, if a specified current is applied to the first X-direction coil 36Xa, the first X-direction coil 36Xa becomes an electromagnet, and the first X-direction magnet 42Xa generates an attractive force (Coulomb force) toward the center of the first X-direction coil 36Xa, causing the X-direction wrist 40 to move in the right direction (+X direction).

[0059] Figure 6 Shows a case of the distribution of the attractive force generated by the first X-direction magnet 42Xa located on the winding axis when the first X-direction coil 36Xa is energized. The first X-direction magnet 42Xa generates the maximum attractive force in the +X direction (right direction) when it is near the outer winding end Cea1. The farther away from the first X-direction coil 36Xa, the smaller the attractive force. When it is near the inner winding end Cea2, it generates the maximum attractive force in the -X direction (left direction). The farther away from the first X-direction coil 36Xa, the smaller the attractive force. Inside the first X-direction coil 36Xa, the attractive force in the +X direction gradually weakens from the winding end Cea1 toward the center Coa and becomes zero at the center Coa. Moreover, if it is toward the winding end Cea2, the attractive force in the -X direction changes, and this attractive force gradually becomes stronger and reaches the winding end Cea2. In other words, the attractive force is usually a force toward the center Coa of the first X-direction coil 36Xa and does not depend on the direction of the current flow.

[0060] Therefore, if the first X-direction coil 36Xa continues to be energized, the first X-direction magnet 42Xa vibrates in the +X and -X directions with the center Coa as the center. However, before the first X-direction magnet 42Xa reaches the center Coa or when it reaches, it can be adjusted by cutting off the current.

[0061] That is, as Figure 5 (b), by supplying a current to the first X-direction coil 36Xa so that the magnitude of the attractive force caused by it exceeds the static friction force between the first component 12 and the second component 14, the second component 14 moves in the +X direction together with the first X-direction magnet 42Xa, and stops moving by cutting off the current flowing through the first X-direction coil 36Xa.

[0062] Then, if the second X-direction coil 36Xb is energized, then as Figure 5As shown in (c), the second X-direction magnet 42Xb is located on the +X side of the center Cob of the second X-direction coil 36Xb, so an attractive force in the -X direction toward the center Cob is generated, and the second component 14 and the second X-direction magnet 42Xb move together in the -X direction. Through the above series of actions, the second component 14 can reciprocate in the X direction relative to the first component 12. For example, X-direction compensation for jitter compensation can be performed on it.

[0063] Moreover, as Figure 5 shown in (d), by applying current to the first X-direction coil 36Xa and the second X-direction coil 36Xb simultaneously to balance the left and right attractive forces, it can thus return to the initial position. It should be noted here that the distance between the first X-direction magnet 42Xa and the second X-direction magnet 42Xb should not be equal to the distance between the center Coa and the center Cob. If the above distances are equal, sometimes the X-direction position of the first X-direction magnet 42Xa coincides with the X-direction position of the center Coa, and the X-direction position of the second X-direction magnet 42Xb coincides with the X-direction position of the center Cob. In this case, the attractive force (i.e., the driving force) between the first X-direction magnet 42Xa and the second X-direction magnet 42Xb is zero, and the second component 14 cannot be moved.

[0064] The same applies when the third component 16 moves relative to the second component 14 in the Y direction. In this case, X is read as Y. Moreover, the first X-direction coil 36Xa and the second X-direction coil 36Xb are installed on the fixed body, the first X-direction magnet 42Xa and the second X-direction magnet 42Xb are installed on the movable body, the first Y-direction coil 36Ya and the second Y-direction coil 36Yb are installed on the movable body, and the first Y-direction magnet 42Ya and the second Y-direction magnet 42Yb are installed on the fixed body. If the first Y-direction coil 36Ya or the second Y-direction coil 36Yb is energized, the third component 16 moves in the Y direction together with the first Y-direction coil 36Ya and the second Y-direction coil 36Yb relative to the second component 14. When moving it in the XY composite direction, either the first X-direction coil 36Xa or the second X-direction coil 36Xb and either the first Y-direction coil 36Ya or the second Y-direction coil 36Yb are energized simultaneously.

[0065] In this first embodiment, the magnet is arranged in a so-called empty space (i.e., the inside of the coil winding). For this reason, miniaturization is easily achieved. Moreover, the initial positions of the second component 14 and the third component 16 are maintained due to static friction. Moreover, the structure can also be such that instead of the X-direction guide recess 20, the X-direction guide protrusion 24, the Y-direction guide recess 28, and the Y-direction guide protrusion 32, partial guide grooves are provided, and a plurality of spheres are arranged between the two facing guide grooves.

[0066] Figure 7 and Figure 8 shows the drive device 10 involved in the second embodiment of the present invention.

[0067] The drive device 10 involved in the second embodiment has a first component 12 and a second component 14.

[0068] Moreover, hemispherical protrusions (not shown) are provided at the four corners of one of the opposing surfaces 18 of the first component 12 and the opposing surface 22 of the second component 14 where the first component 12 and the second component 14 face each other, and the other opposing surface slides on these protrusions.

[0069] A coil arrangement groove 58 is provided at the center of the opposing surface 18 of the first component 12. The coil arrangement groove 58 is formed in a cross shape extending in the X direction and the Y direction. On the coil arrangement groove 58, a first X-direction coil 36Xa and a second X-direction coil 36Xb are fixedly arranged at intervals in the X direction, and a first Y-direction coil 36Ya and a second Y-direction coil 36Yb are fixedly arranged at intervals in the Y direction.

[0070] As Figure 9 shown, a pedestal 60 is formed on the opposing surface 22 of the second component 14, protruding toward the first component 12, and the formation of the X-direction arm 40 and the Y-direction arm 50 extends from the pedestal 60 in the X direction and the Y direction respectively. A first X-direction magnet 42Xa is held at the -X-direction end of the X-direction arm 40, and a second X-direction magnet 42Xb is held at the +X-direction end. Moreover, a first Y-direction magnet 42Ya is held at the -Y-direction end of the Y-direction arm 50, and a second Y-direction magnet 42Yb is held at the +Y-direction end.

[0071] Moreover, as Figure 10 shown, the first X-direction magnet 42Xa, the second X-direction magnet 42Xb, the first Y-direction magnet 42Ya, and the second Y-direction magnet 42Yb are respectively inserted into the first X-direction coil 36Xa, the second X-direction coil 36Xb, the first Y-direction coil 36Ya, and the second Y-direction coil 36Yb, and are non-contact with them.

[0072] Moreover, a magnet 62 in a quadrilateral shape is provided on the back surface of the first component 12, and the second component 14 is held on the first component 12 by the magnetic force formed between the first X-direction magnet 42Xa, the second X-direction magnet 42Xb, the first Y-direction magnet 42Ya, and the second Y-direction magnet 42Yb.

[0073] The situation in the second embodiment is the same as that in the first embodiment. By applying a prescribed current to the first X-direction coil 36Xa, the second X-direction coil 36Xb, the first Y-direction coil 36Ya, and the second Y-direction coil 36Yb, the second component 14 can be moved relative to the first component 12 in the XY direction. Alternatively, the fixed body and the movable body can be swapped so that the first component 12 moves relative to the second component 14 in the XY direction.

[0074] Moreover, the following structure can also be adopted, that is, suspension wires extending in the +Z direction are provided at the four corners of the first component 12, and the second component 14 is suspended by these suspension wires. In this case, the first component 12 and the second component 14 are non-contact, and moreover, a magnet 62 is not required for the above-mentioned holding purpose.

[0075] Figure 11 The imaging device 64 is shown as an example of an optical component driving device using the driving device 10 according to the second embodiment. The imaging device 64 is used as a small imaging device used in electronic devices such as mobile phones and smart phones.

[0076] The imaging device 64 includes an autofocus assembly 66, a driving device 10, and a base 68.

[0077] The autofocus assembly 66 houses a lens 72 in a housing 70. When observing the housing 70 from the optical axis direction of the lens 72, it is quadrangular, and a circular incident hole 74 for light to enter is formed on the upper surface of the housing 70. The lens 72 is supported by a lens support body (not shown), and this lens support body moves in the optical axis direction of the lens 72 through a well-known autofocus mechanism to adjust the light incident from the incident hole 74 so that it is focused on an image sensor 76 described later. The lower end of the housing 70 is fixed to the base 68 and is non-contact with the driving device 10. Moreover, the first component 12 is also fixed to the base 68.

[0078] Moreover, in this embodiment, the Z direction is the optical axis direction.

[0079] The image sensor 76 is fixed to the upper surface of the second component 12. Therefore, the image sensor 76 moves in the XY direction relative to the base 68 fixed to the first component 12 through the driving device 10 to perform shake compensation for the imaging device 64.

[0080] Figure 12Displays an example of an optical component drive device of a photographic device 64A that uses a modified example of the drive device 10 according to the above-described second embodiment. In the photographic device 64A, the first X-direction coil 36Xa, the second X-direction coil 36Xb, the first Y-direction coil 36Yb, and the second Y-direction coil 36Yb are provided on the outer fixed frame 86. The two X-direction arms 40, 40 and the two Y-direction arms 50, 50 are provided on the autofocus assembly 66A and protrude outward. The first X-direction magnet 42Xa is provided at the tip of one X-direction arm 40, and the second X-direction magnet 42Xb is provided at the tip of the other X-direction arm 40. The first Y-direction magnet 42Ya is provided at the tip of one Y-direction arm 50, and the second Y-direction magnet 42Yb is provided at the tip of the other Y-direction arm 50.

[0081] The outer fixed frame 86 is provided on the base 68 and forms a quadrangular frame shape when viewed from the Z direction. Each coil is provided on each side and may also be interposed between, for example, an FPC. The outer fixed frame 86 can also be used as a housing, or a housing can be provided separately.

[0082] The autofocus assembly 66A includes an intermediate member 80 and a lens support 82 supported by leaf springs 84 with respect to the intermediate member 80. The intermediate member 80 is supported by four suspension wires extending in the Z direction from the base 68, whereby the autofocus assembly 66A is supported. A through hole for mounting a lens is provided on the lens support 82, and a through hole is provided on the base 68 so that light from the subject reaches the image sensor provided on the -Z side (inside the drawing) of the base 68. The autofocus assembly 66A corresponding to the second component overlaps the base 68 corresponding to a part of the first component in the Z direction and is not in direct contact.

[0083] By energizing one of the first X-direction coil 36Xa or the second X-direction coil 36Xb and / or one of the first Y-direction coil 36Ya or the second Y-direction coil 36Yb, the autofocus assembly 66A moves in the X direction and / or the Y direction. Thereby, the photographic device 64A can have an anti-shake function. Further, by an AF drive mechanism (not shown), the lens support 82 moves in the Z direction, whereby the photographic device 64A has an autofocus function.

[0084] In the above-described first embodiment, in one direction of movement, for example, the X direction, the first X-direction coil 36Xa and the second X-direction coil 36Xb are provided at intervals, and the first X-direction magnet 42Xa and the second X-direction magnet 42Xb are provided correspondingly, but this is not limited thereto. And, for example, in Figure 13(a), the first coil 36a and the second coil 36b have the same length, and exactly only half of their lengths are overlapped and wound. A magnetic body 42 is provided and configured at the position of the left end of the second coil 36b (and not at the center of the first coil 36a). If an electric current is applied to the second coil 36b, the magnetic body 42, which is subjected to a force towards the center of the second coil 36b, moves to the position of the center of the second coil 36b (and the right end of the first coil 36a). In Figure 13 (b), the magnetic body 42 is configured at Figure 13 the end position of (a), i.e., the position of the right end of the first coil 36a (and the center of the second coil 36b). If an electric current is applied to the first coil 36a, the magnetic body 42, which is subjected to a force towards the center of the first coil 36a, moves to the position of the center of the first coil 36a (and the left end of the second coil 36b).

[0085] In Figure 14 (a), the first coil 36a and the second coil 36b have the same length and are wound around each other such that the right end of the first coil 36a exactly contacts the left end of the second coil 36b. A first magnetic body 42a is provided at the center position of the first coil 36a, and a second magnetic body 42b is provided at the boundary position between the first coil 36a and the second coil 36b. The first magnetic body 42a and the second magnetic body 42b are connected to each other through a wrist portion 40A. If an electric current is applied to the second coil 36b, the second magnetic body 42b, which is subjected to a force towards the center of the second coil 36b, moves to the position of the center of the second coil 36b, and at the same time, the first magnetic body 42a also moves to the boundary position between the first coil 36a and the second coil 36b. In Figure 14 (b), if an electric current is applied to the first coil 36a, the first magnetic body 42a located at the boundary position between the first coil 36a and the second coil 36b moves to the center position of the first coil 36a, and at the same time, the second magnetic body 42b also moves to the boundary position between the first coil 36a and the second coil 36b.

[0086] Moreover, it can also be made into the structure shown in Figure 15 (a) to Figure 15 (d). The first coil 36a, the second coil 36b, and the third coil 36c have the same length, and only exactly half of their lengths are overlapped and wound respectively. That is, the right end of the first coil 36a contacts the left end of the third coil 36c, and the second coil 36b overlaps with the first coil 36a by half and with the third coil 36c by half. In Figure 15 (a), a magnetic body 42 is configured at the position of the left end of the second coil 36b (and the center of the first coil 36a). If an electric current is applied to the second coil 36b, the magnetic body 42 moves towards the center of the second coil 36b (and the left end of the third coil 36c). In Figure 15(b), if current is applied to the third coil 36c, the magnetic body 42 moves toward the center of the third coil 36c (and the right end of the second coil 36b). In Figure 15 (c), if current is applied to the second coil 36b, the magnetic body 42 moves toward the center of the second coil 36b (and the right end of the first coil 36a). In Figure 15 (d), if current is applied to the first coil 36a, the magnetic body 42 moves toward the center of the first coil 36a (and the left end of the second coil 36b). The number of coils is not limited to three and can be further increased. Thus, the magnetic body 42 can be easily moved over a long distance. For example, an autofocus function and a zoom function for moving the lens in the optical axis direction can also be achieved. And, in Figure 15 (a), current can also be applied to the second coil 36b and the third coil 36c simultaneously; in Figure 15 (c), current can also be applied to the second coil 36b and the first coil 36a simultaneously.

[0087] Moreover, as Figure 16 shown, a ring-shaped first outer yoke 88a can be arranged outside the first coil 36a, and a ring-shaped second outer yoke 88b can be arranged outside the second coil 36b. The first outer yoke 88a and the second outer yoke 88b are made of magnetic materials. Thus, the attractive force acting on the first magnetic body 42a and the second magnetic body 42b can be increased by the first coil 36a and the second coil 36b. And, as Figure 17 shown, if the outer end faces (i.e., the left end face of the first coil 36a and the right end face of the second coil 36b) are also covered by the first outer yoke 88a and the second outer yoke 88b, the attractive force can be further increased. However, if the first magnetic body 42a is too close to the left end face side of the first coil 36a and the second magnetic body 42b is too close to the right end face side of the second coil 36b, they will be strongly attracted instead, so extra attention is needed.

[0088] Moreover, in the above embodiment, it is mainly described that the driving device drives the movable body in the XY direction for jitter compensation. However, only a part of the previous description is mentioned, but the optical axis direction of the lens can be taken as the X direction, the radial direction of the lens can be taken as the Z direction, and the movable body for moving the lens can be driven in the X direction to achieve the autofocus function and the zoom function. And, in a photographic device, not only a lens and an image sensor can be used, but also a driving mirror and a prism can be used. And not only a photographic device can be used, but also a device applicable to adjusting the position of, for example, a light-emitting element, or adjusting the position of a semiconductor in a manufacturing process, etc. can be used.

[0089]

Symbol Explanation

[0090] 10 Driving device

[0091] 12 First component

[0092] 14 Second component

[0093] 16 Third component

[0094] 18 Opposite face

[0095] 20 X-direction guiding recess

[0096] 22 Opposite face

[0097] 24 X-direction guiding projection

[0098] 26 Opposite face

[0099] 28 Y-direction guiding recess

[0100] 30 Opposite face

[0101] 32 Y-direction guiding projection

[0102] 34 X-direction coil arrangement groove

[0103] 36Xa First X-direction coil

[0104] 36Xb Second X-direction coil

[0105] 36Ya First Y-direction coil

[0106] 36Yb Second Y-direction coil

[0107] 36a First coil

[0108] 36b Second coil

[0109] 36c Third coil

[0110] 38 First pedestal

[0111] 40 X-direction arm

[0112] 40A Arm

[0113] 42 Magnetic body

[0114] 42Xa First X-direction magnetic body

[0115] 42Xb Second X-direction magnetic body

[0116] 42Ya First Y-direction magnetic body

[0117] 42Yb Second Y-direction magnetic body

[0118] 42a First magnetic body

[0119] 42b Second magnetic body

[0120] 44 Y-direction coil arrangement groove

[0121] 48 Second pedestal

[0122] 50 Y-direction arm

[0123] 54 X-direction magnet

[0124] 56 Y-direction magnet

[0125] 58 Coil arrangement groove

[0126] 60 Pedestal

[0127] 62 Magnet

[0128] 64, 64A Photographing device

[0129] 66, 66A Auto-focus component

[0130] 68 Base

[0131] 70 Housing

[0132] 72 Lens

[0133] 74 Incident hole

[0134] 76 Image sensor

[0135] 78 Suspension wire

[0136] 80 Intermediate member

[0137] 82 Lens support

[0138] 84 Leaf spring

[0139] 86 Outer fixing frame

[0140] 88a First outer yoke

[0141] 88b Second outer yoke

Claims

1. A driving device, characterized in that: In a three-dimensional XYZ rectangular coordinate system, it has a first component, a second component that overlaps with the first component in the Z direction and is relatively movable with respect to the first component in the X direction, at least two X-direction coils spaced and fixed on the first component in the X direction, at least two X-direction magnets spaced and fixed on the second component in the X direction, and the at least two X-direction coils have a common winding axis in the X direction, one of the X-direction magnets is inserted into one of the corresponding X-direction coils, and the other X-direction magnet is inserted into the other X-direction coil; If a specified current is applied to a specified one of the X-direction coils, the X-direction coil becomes an electromagnet, and the corresponding X-direction magnet generates an attractive force towards the center of the X-direction coil, causing the X-direction magnet to move in one of the specified +X direction or -X direction.

2. The drive device according to claim 1, wherein In the initial position, one of the X-direction magnets faces one of the X-direction coils near the -X direction end, and the other X-direction magnet faces the other X-direction coil near the +X direction end.

3. The drive device according to claim 1, characterized in that, Applying a specified current to one of the X-direction coils drives either side of the first component or the second component in the +X direction; applying a specified current to the other X-direction coil drives either side of the first component or the second component in the -X direction.

4. The drive device according to claim 1, characterized in that, Applying specified currents to one of the X-direction coils and the other X-direction coil simultaneously returns the first component or the second component to the initial position.

5. A driving device, characterized in that: In a three-dimensional XYZ rectangular coordinate system, it has a first component, a second component that overlaps with the first component in the Z direction and slides freely in the X direction, a third component that overlaps with the second component in the Z direction and slides freely in the Y direction, at least two X-direction coils spaced in the X direction on either the first component or the second component, at least two X-direction magnets spaced in the X direction on the other of the first component or the second component, at least two Y-direction coils spaced in the Y direction on either the second component or the third component, at least two Y-direction magnets spaced in the Y direction on the other of the second component or the third component, one of the X-direction magnets is inserted into one of the corresponding X-direction coils, and the other X-direction magnet is inserted into the other X-direction coil, one of the Y-direction magnets is inserted into one of the corresponding Y-direction coils, and the other Y-direction magnet is inserted into the other Y-direction coil; If a prescribed current is applied to the prescribed X-direction coil, the X-direction coil becomes an electromagnet, and the corresponding X-direction magnetic body generates an attractive force toward the center of the X-direction coil, causing the X-direction magnetic body to move in one direction of the prescribed +X direction or -X direction; if a prescribed current is applied to the prescribed Y-direction coil, the Y-direction coil becomes an electromagnet, and the corresponding Y-direction magnetic body generates an attractive force toward the center of the Y-direction coil, causing the Y-direction magnetic body to move in one direction of the prescribed +Y direction or -Y direction.

6. A driving device, characterized in that: In a three-dimensional XYZ rectangular coordinate system, it has a first component, a second component that overlaps the first component in the Z direction and is slidable freely in the X direction, at least two X-direction coils spaced apart in the X direction on the first component, at least two X-direction magnetic bodies spaced apart in the X direction on the second component, at least two Y-direction coils spaced apart in the Y direction on the first component, at least two Y-direction magnetic bodies spaced apart in the Y direction on the second component, one of the X-direction magnetic bodies is inserted into one of the corresponding X-direction coils, and the other X-direction magnetic body is inserted into the other X-direction coil, one of the Y-direction magnetic bodies is inserted into one of the corresponding Y-direction coils, and the other Y-direction magnetic body is inserted into the other Y-direction coil; If a prescribed current is applied to the prescribed X-direction coil, the X-direction coil becomes an electromagnet, and the corresponding X-direction magnetic body generates an attractive force toward the center of the X-direction coil, causing the X-direction magnetic body to move in one direction of the prescribed +X direction or -X direction; if a prescribed current is applied to the prescribed Y-direction coil, the Y-direction coil becomes an electromagnet, and the corresponding Y-direction magnetic body generates an attractive force toward the center of the Y-direction coil, causing the Y-direction magnetic body to move in one direction of the prescribed +Y direction or -Y direction.

7. A driving device, characterized in that: It has a first component, a second component that is relatively movable with respect to the first component in a prescribed direction, a first coil, a second coil, and a third coil fixedly provided on the first component, a magnetic body fixedly provided on the second component, the three coils have a common winding axis in the prescribed direction, and the center positions of the three coils are set at different positions in the prescribed direction, the one magnetic body is provided on the winding axis; the first coil, the second coil, and the third coil have the same length, and are respectively overlapped and wound only exactly half of their lengths. One end of the first coil and one end of the third coil are in contact, and half of the second coil overlaps with the first coil and the other half overlaps with the third coil. When the one magnetic body is disposed at one end of the second coil and at the center of the first coil, if an electric current is applied to the second coil, the second coil becomes an electromagnet, and the one magnetic body moves toward the center of the second coil and to one end of the third coil; further, if an electric current is applied to the third coil, the third coil becomes an electromagnet, and the one magnetic body moves toward the center of the third coil and to the other end of the second coil; further, if an electric current is applied to the second coil, the second coil becomes an electromagnet, and the one magnetic body moves toward the center of the second coil and to one end of the first coil; further, if an electric current is applied to the first coil, the first coil becomes an electromagnet, and the one magnetic body moves toward the center of the first coil and to one end of the second coil.

8. An optical component driving device, characterized in that: In the driving device according to claim 1, 5, 6 or 7, any one component is used as a fixed body, and other components are used as movable bodies, and optical components are provided on the fixed body and the movable bodies.

9. An electronic device, characterized in that: It has the optical component driving device according to claim 8.

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